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Life in Freshwater


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Euglena magnified 500x

Like the Amoeba this is a single celled, microscopic organism which is associated with aquatic environments. It has a more fixed shape than the Amoeba with a food groove at one end. An orange spot is light sensitive and this is near this groove. A long whip-like flagellum is at this end. Euglenae are very small and require high magnifications to see them. When present in high numbers they turn the water green. Euglena is often seen in small pools of water and ditches where there is a high nitrate level. In ideal places they will turn the water bright green. For example, on farms, vehicle ruts filled with water and cow manure will quickly go green with Euglena in warm weather. Common across central Europe, both east and west.

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